U.S. patent application number 16/849764 was filed with the patent office on 2021-07-08 for device and method for obtaining brightness of display panel.
The applicant listed for this patent is Wuhan Tianma Micro-Electronics Co., Ltd.. Invention is credited to Xiangyu GAO, Guang WANG, Jingxiong ZHOU, Ruiyuan ZHOU.
Application Number | 20210210010 16/849764 |
Document ID | / |
Family ID | 1000004812079 |
Filed Date | 2021-07-08 |
United States Patent
Application |
20210210010 |
Kind Code |
A1 |
GAO; Xiangyu ; et
al. |
July 8, 2021 |
DEVICE AND METHOD FOR OBTAINING BRIGHTNESS OF DISPLAY PANEL
Abstract
A device and a method for obtaining brightness of a display
panel are provided. The display panel includes a flat area and a
curved area and the curved areas including at least one first
curved area. The device includes a brightness acquisition
component; an optical path adjustment component; and a control
component. Principle light exited from the flat area is incident on
a first area of a viewfinder plane of the brightness acquisition
component; the optical path adjustment component is disposed on an
optical path of principle light exited from the first curved area,
and configured to adjust the principle light to be incident on a
second area of the viewfinder plane; the first area does not
overlap with and the second area; and the control component is
configured to process an image captured by the brightness
acquisition component to obtain the brightness of the display
panel.
Inventors: |
GAO; Xiangyu; (Wuhan,
CN) ; WANG; Guang; (Wuhan, CN) ; ZHOU;
Ruiyuan; (Wuhan, CN) ; ZHOU; Jingxiong;
(Wuhan, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Wuhan Tianma Micro-Electronics Co., Ltd. |
Wuhan |
|
CN |
|
|
Family ID: |
1000004812079 |
Appl. No.: |
16/849764 |
Filed: |
April 15, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G09G 2320/0626 20130101;
G09G 2360/145 20130101; G09G 3/3225 20130101 |
International
Class: |
G09G 3/3225 20060101
G09G003/3225 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 3, 2020 |
CN |
202010005835.1 |
Claims
1. A device for obtaining brightness of a display panel, the
display panel including a flat area and a curved area and the
curved area including at least one first curved area, the device
comprising: a brightness acquisition component; an optical path
adjustment component; and a control component, wherein: the
brightness acquisition component is configured to face straight to
the flat area of the display panel; principle light exited from the
flat area is incident on a first area of a viewfinder plane of the
brightness acquisition component; the optical path adjustment
component is disposed on an optical path of principle light exited
from the first curved area, and configured to adjust the principle
light exited from the first curved area to be incident on a second
area of the viewfinder plane of the brightness acquisition
component; the first area does not overlap with and the second
area; and the control component is connected to the brightness
acquisition component and configured to process an image captured
by the brightness acquisition component to obtain the brightness of
the display panel.
2. The device according to claim 1, wherein: the first curved area
includes a plurality of pixels; the second area includes a
plurality of pixel areas; each pixel area of the plurality of pixel
areas corresponds to one pixel of the plurality of pixels; all
principle light exited from any pixel of the plurality of pixels in
the first curved area are incident on a corresponding pixel area;
and any two adjacent pixel areas do not overlap with each
other.
3. The device according to claim 1, wherein: the curved area
further includes a second curved area; the second curved area is
located between the first curved area and the flat area; and
principle light exited from the second curved area is directly
incident on the first area of the viewfinder plane of the
brightness acquisition component.
4. The device according to claim 1, wherein: the optical path
adjustment component includes a reflection mirror; and a reflection
surface of the reflection mirror is disposed opposing to the first
curved surface.
5. The device according to claim 4, wherein: the reflection surface
is a curved surface; and the curved surface is convex toward a side
facing away from the first curved area.
6. The device according to claim 1, wherein: the optical path
adjustment component includes at least one refraction layer; a
refractive index of the at least one refraction layer is greater
than a refractive index of air; and when the at least one
refraction layer includes a plurality of refraction layers, the
plurality of refraction layers are sequentially stacked along a
light-emitting direction of the display panel and refractive
indexes of the plurality of refection layers are sequentially
decreased along the light-emitting direction of the display
panel.
7. The device according to claim 6, wherein: the optical path
adjustment component only covers the curved area.
8. The device according to claim 6, wherein: the optical path
adjustment component covers the display panel.
9. The device according to claim 8, wherein: the optical path
adjustment component is attached and fitted to the display
panel.
10. The device according to claim 9, wherein: at least one of the
plurality of refraction layers includes a gas layer and a solid
sealed layer sequentially stacked along the light-emitting
direction of the display panel.
11. The device according to claim 8, wherein: a sealed space is
located between the optical path adjustment component and the
display panel; and a pressure of the sealed space is smaller than
an atmosphere pressure.
12. The device according to claim 8, wherein: the at least one of
the plurality of refraction layers includes a single solid material
layer.
13. A method for obtaining brightness of a display panel,
comprising: providing a display panel including a flat area, and a
curved area including at least a first curved area; providing a
device for obtaining brightness of the display panel, wherein: the
device includes a brightness acquisition component, an optical path
adjustment component, and a control component; the brightness
acquisition component is configured to face straight to the flat
area of the display panel; principle light exited from the flat
area is incident on a first area of a viewfinder plane of the
brightness acquisition component; the optical path adjustment
component is disposed on an optical path of principle light exited
from the first curved area, and configured to adjust the principle
light exited from the first curved area to be incident on a second
area of the viewfinder plane of the brightness acquisition
component; the first area does not overlap with and the second
area; and the control component is connected to the brightness
acquisition component and configured to process an image captured
by the brightness acquisition component to obtain the brightness of
the display panel; lighting up the display panel; capturing an
image of a displayed image of the display panel using the
brightness acquisition component; and processing the image using
the control component to obtain the brightness of the display
panel.
14. The method according to claim 13, wherein: the first curved
area includes a plurality of pixels; the second area includes a
plurality of pixel areas; each pixel area of the plurality of pixel
areas corresponds to one pixel of the plurality of pixels; all
principle light exited from each pixel of the plurality of pixels
in the first curved area are incident on a corresponding area; and
any two adjacent pixel areas do not overlap with each other.
15. The method according to claim 14, wherein processing the image
using the control component to obtain the brightness of the display
panel comprises: obtaining a brightness compensation coefficient of
each pixel of the plurality of pixels in the curved area;
extracting a first original brightness of each pixel of the
plurality of pixels in the curved area in the image; obtaining a
target brightness of each pixel of the plurality of pixels in the
curved area according to the brightness compensation coefficient
and the first original brightness; extracting a second original
brightness of each pixel of the plurality of pixels in the flat
area in the image; and configuring the second original brightness
of each pixel of the plurality of pixels in the flat area and the
target brightness of each pixel of the plurality of pixels in the
curved area as the brightness of the display panel.
16. The method according to claim 14, wherein obtaining the
brightness compensation coefficient of each pixel of the plurality
of pixels in the curved surface comprises: extracting the second
original brightness of n-columns of pixels in the flat area near
one side of the curved area and calculating a first average value
of the second original brightness of the n columns of pixels;
extracting the first original brightness of each pixel in the
curved area, and calculating a second average value of the first
original brightness of every adjacent m-columns of pixels;
configuring a ratio of each second average value to the first
average value as the brightness compensation coefficient of each
pixel corresponding to the second average value; n and m are both
positive integers; 1.ltoreq.n.ltoreq.P; P is a total number of
columns of pixels in the flat area; 1.ltoreq.m.ltoreq.Q; Q is an
integer time of m; and Q is a total number of columns of the pixels
in the curved area.
17. The method according to claim 16, wherein:
5.ltoreq.n.ltoreq.15.
18. The method according to claim 16, wherein: m=1.
19. The method according to claim 14, wherein obtaining the target
brightness of each pixel of the plurality of pixels in the curve
area according to the brightness compensation coefficient and the
first original brightness comprises: configuring a product of the
first original brightness and the brightness compensation
coefficient of a pixel of the plurality of pixels in the curved
area as the target brightness of the pixel.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority of Chinese Patent
Application No. 202010005835.1, filed on Jan. 3, 2020, the entire
contents of which are hereby incorporated by reference.
FIELD OF THE DISCLOSURE
[0002] The present disclosure generally relates to the field of
display technology and, more particularly, relates to a device and
a method for obtaining brightness of a display panel.
BACKGROUND
[0003] Organic light-emitting display panels have the advantages of
self-illumination, no backlight, low power, high brightness, and
small thickness. However, organic light-emitting display panels
also have poor brightness uniformity and afterimage problems,
causing undesirable display effects. Compensation technologies are
often used to solve such problems.
[0004] Optical compensation technology is a commonly used
compensation technology. In particular, a corresponding
compensation is performed after obtaining the pixel brightness
information of the display panel through an external device. The
external device is usually a CCD camera. The CCD camera captures
the light exited from each area of the display panel to form an
image containing the pixel brightness information. For a flexible
display panel, the energy of the light exited from an area with a
large bending angle is substantially small along the direction
perpendicular to the viewfinder plane of the CCD camera. Thus, the
CCD camera is unable to effectively obtain the pixel brightness
information of the area with the large bending angle. Accordingly,
a corresponding compensation based on the pixel brightness
information of the area cannot be subsequently performed, and the
compensation effect of the display panel is adversely affected.
[0005] Therefore, there is a need to provide a device and a method
to accurately obtain the brightness of a display panel. The
disclosed device and method are directed to solve one or more
problems set forth above and other problems in the art.
BRIEF SUMMARY OF THE DISCLOSURE
[0006] One aspect of the present disclosure provides a device for
obtaining brightness of a display panel. The display panel includes
a flat area and a curved area; and the curved area includes at
least one first curved area. The device may include a brightness
acquisition component; an optical path adjustment component; and a
control component. The brightness acquisition component is
configured to face straight to the flat area of the display panel;
principle light exited from the flat area is incident on a first
area of a viewfinder plane of the brightness acquisition component;
the optical path adjustment component is disposed on an optical
path of principle light exited from the first curved area, and
configured to adjust the principle light exited from the first
curved area to be incident on a second area of the viewfinder plane
of the brightness acquisition component; the first area does not
overlap with and the second area; and the control component is
connected to the brightness acquisition component and configured to
process an image captured by the brightness acquisition component
to obtain the brightness of the display panel.
[0007] Another aspect of the present disclosure provides a method
for obtaining brightness of a display panel. The method includes
providing a display panel including a flat area, and a curved area
including at least one first curved area; and providing a device
for obtaining brightness of the display panel. The device includes
a brightness acquisition component, an optical path adjustment
component, and a control component. The brightness acquisition
component is configured to face straight to the flat area of the
display panel; principle light exited from the flat area is
incident on a first area of a viewfinder plane of the brightness
acquisition component; the optical path adjustment component is
disposed on an optical path of principle light exited from the
first curved area, and configured to adjust the principle light
exited from the first curved area to be incident on a second area
of the viewfinder plane of the brightness acquisition component;
the first area does not overlap with and the second area; and the
control component is connected to the brightness acquisition
component and configured to process an image captured by the
brightness acquisition component to obtain the brightness of the
display panel. The method also includes lighting up the display
panel; capturing an image of a displayed image of the display panel
using the brightness acquisition component; and processing the
image using the control component to obtain the brightness of the
display panel.
[0008] Other aspects of the present disclosure can be understood by
those skilled in the art in light of the description, the claims,
and the drawings of the present disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The following drawings are incorporated in and constitute a
part of the specification, illustrating embodiments of the present
disclosure, and together with the detailed descriptions serve to
explain the mechanism of the present disclosure.
[0010] FIG. 1 illustrates brightness acquisition of a display
panel;
[0011] FIG. 2 illustrates a brightness image taken by the
brightness acquisition component in FIG. 1;
[0012] FIG. 3 illustrates an exemplary device for obtaining
brightness of a display panel consistent with various disclosed
embodiments of the present disclosure;
[0013] FIG. 4 illustrates an exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0014] FIG. 5 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0015] FIG. 6 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0016] FIG. 7 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0017] FIG. 8 illustrates a portion of the device in FIG. 4;
[0018] FIG. 9 illustrates a portion of another exemplary device for
obtaining brightness of a display panel working normally consistent
with various disclosed embodiments of the present disclosure;
[0019] FIG. 10 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0020] FIG. 11 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0021] FIG. 12 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0022] FIG. 13 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0023] FIG. 14 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0024] FIG. 15 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure;
[0025] FIG. 16 illustrates a portion of the device in FIG. 15;
[0026] FIG. 17 illustrates a flowchart of an exemplary method for
obtaining brightness of a display panel consistent with various
disclosed embodiments of the present disclosure; and
[0027] FIG. 18 illustrates an exemplary brightness image of a
display panel consistent with various disclosed embodiments of the
present disclosure.
DETAILED DESCRIPTION
[0028] To further describe the technical approach and effects
adopted by the present disclosure to achieve the intended purposes
of the present disclosure, specific implementations of a device and
a method for obtaining brightness of a display panel according to
the present disclosure are described below with reference to the
accompanying drawings and preferred embodiments. The structure,
characteristics and effects are described in detail below. Wherever
possible, the same reference numbers will be used throughout the
drawings to refer to the same or like parts.
[0029] The present disclosure provides a device for obtaining
brightness of a display panel and a method for obtaining brightness
of a display panel. The display panel may include a flat area and a
curved area. The curved area may include at least one first curved
area. The device for obtaining brightness of the display panel may
include a brightness acquisition component, an optical path
adjustment component, and a control component.
[0030] The brightness acquisition component may be configured to
directly face to the flat area of the display panel, and the
principle light exited from the flat area may be incident on a
first area of the viewfinder plane of the brightness acquisition
component.
[0031] The optical path adjustment component may be disposed on an
optical path of the light exited from the first curved area, and
may be configured to adjust the principle light exited from the
first curved area to a second area of the viewfinder plane of the
brightness acquisition component. The second area may not overlap
with the first area.
[0032] The control component may be connected to the brightness
acquisition component; and may be configured to process the image
captured by the brightness acquisition component to obtain the
brightness of the display panel.
[0033] According to the technical solution provided in the present
disclosure, by disposing the optical path adjustment component on
the optical path of the light exited from the first curved area of
the display panel, the optical path adjustment component may be
configured to adjust the principle light exited from the first
curved area to be incident on the second area of the viewfinder
plane of the brightness acquisition component. The second area may
not overlap the first area of the viewfinder plane of the
brightness acquisition component corresponding to the principle
light exited from the flat area of the display panel such that the
principle light exited from the flat area and the first curved area
of the display panel may be incident on different areas of the
viewfinder plane of the brightness acquisition component. The
brightness acquisition component may obtain the brightness
information of all pixels in the display panel, and the principle
light exited from the flat area and the first curved area may not
interfere with each other. Thus, the accuracy of the pixel
brightness information obtained by the brightness acquisition
component may be improved; and the compensation effect may be
enhanced.
[0034] The above may be the core idea of the present disclosure.
The technical solutions in the embodiments of the present
disclosure will be clearly and completely described below with
reference to the drawings in the embodiments of the present
disclosure. Obviously, the described embodiments are only a part of
the embodiments of the present disclosure; and not all embodiments.
Based on the embodiments of the present disclosure, all other
embodiments obtained by those of ordinary skill in the art without
creative efforts shall fall within the protection scope of the
present disclosure.
[0035] In the following description, specific details are set forth
in order to fully understand the present disclosure, but the
present disclosure can also be implemented by other embodiments
different from those described herein, and those skilled in the art
may make similar promotion without violating the meaning of the
present disclosure. Thus, the present disclosure is not limited by
the specific embodiments disclosed below.
[0036] Secondly, the present disclosure is described in detail with
reference to schematic diagrams. In the detailed description of the
embodiments of the present disclosure, for the convenience of
explanation, the schematic diagrams showing the structure of the
device are not partially enlarged according to general proportions,
and the schematic diagrams are merely examples, which should not
limit the scope of the present disclosure. In addition, the actual
production should include three-dimensional sizes of length, width
and height.
[0037] FIG. 1 illustrates a device for obtaining brightness of a
display panel. As shown in FIG. 1, the display panel 3 includes a
flat area 31 and two curved areas 32. The flat area 31 is disposed
to face to a brightness acquisition component 1. The curved areas
32 are located outside the flat area 31. Each light-emitting point
in the display panel 3 simultaneously emits a plurality of rays of
light transmitted along different directions, but the energy of the
light is mainly concentrated on the principle light transmitted
along the direction perpendicular to the tangent of the
light-emitting point. FIG. 1 illustrates the first principal light
A exited from the light-emitting points in the flat area 31, the
second principal light B exited from the light-emitting points in
the curved area 32 with a small curvature, and the third principal
light C exited from the light-emitting points in the curved area 32
with a large curvature. The image acquisition component 1 is used
to collect the light incident on the viewfinder plane 11 to form an
image containing pixel brightness information. As shown in FIG. 1,
the image acquisition component 1 is capable of acquiring the first
principal light A exited from the light-emitting point in the flat
area 31 and the second principal light B exited from the
light-emitting point in the curved area 32 with the small
curvature. However, the third principal light C exited from the
light-emitting point in the curved area 32 with the large curvature
cannot be acquired. The auxiliary light exited from the
light-emitting point of the third principal light C and incident
perpendicularly on the viewfinder plane 11 is used to form a
brightness image of a corresponding area.
[0038] On the one hand, among the light exited from a same
light-emitting point, the light farther away from the principle
light have less energy. Therefore, in the curved area 32 with the
large curvature, as the degree of curvature increases, the portion
of the light exited from the light-emitting point incident on the
viewfinder plane 11 is reduced. As a result, the portion of the
image formed by the brightness acquisition component 1
corresponding to the curved area 32 having the large curvature is
almost black. On the other hand, as the curvature of the curved
area 32 increases, the distance between the vertical projections of
adjacent pixels on the plane to which the flat area 31 belongs in
the curved area 32 with the large curvature decreases. If the light
exited from the pixel and reaching the viewfinder plane 11 form
pixel areas, as the curvature of the curved area 32 increases, the
distance between the pixel areas corresponding to adjacent pixels
gradually decreases, and the adjacent pixel areas gradually
overlap. Thus, the two pixel areas cannot be accurately
distinguished. Accordingly, the brightness information of the
corresponding pixels cannot be accurately extracted in the
brightness image.
[0039] FIG. 2 illustrates an exemplary brightness image of the
display panel taken by the brightness acquisition component in FIG.
1. As shown in FIG. 2, the brightness image includes a first area
41 and two second areas 42. The first area 41 corresponds to the
flat area of the display panel, and the second areas 42 correspond
to the curved areas of the display panel. Along the direction that
the degree of curvature of the curved area increases, the
corresponding brightness information in the brightness image is
reduced, and the edge area has no brightness information and it is
pure black. Thus, it is impossible to extract the pixel brightness
information of the corresponding curved area from the brightness
image; and the compensation effect may be adversely affected.
[0040] The present disclosure provides a device for obtaining
brightness of a display panel and a method for obtaining brightness
of a display panel. The device and the method for obtaining
brightness of the display panel may enable all the principle light
exited from the light-emitting points in the flat area and the
curved area of the display panel to be incident on the viewfinder
plane of a brightness acquisition component. The brightness image
formed by the brightness acquisition component may accurately
contain the brightness information of all pixels of the display
panel, which may facilitate the effective compensation of pixel
brightness.
[0041] FIG. 3 illustrates an exemplary device for obtaining
brightness of a display panel consistent with various disclosed
embodiments of the present disclosure. As shown in FIG. 3, the
device 10 for obtaining brightness of the display panel may include
a brightness acquisition component 100, an optical path adjustment
component 200, and a control component 300.
[0042] FIG. 4 illustrates an exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure. As shown
in FIG. 4, the display panel 400 may include a flat area 410 and a
curved area 420. The curved area 420 may include at least one first
curved area 421. The brightness acquisition component 100 may be
configured to face to the flat area 410 of the display panel 400,
and the principle light D exited from the flat area 410 may be
incident on a first area 510 of a viewfinder plane 500 of the
brightness acquisition component 100. The optical path adjustment
component 200 may be disposed on the optical path of the light
exited from the first curved area 421, and may be configured to
adjust the principle light F exited from the first curved area 421
to be incident on the second area 520 of the viewfinder plane 500
of the brightness acquisition component 100. The second area 520
may not overlap with the first area 510, and the control component
300 may be connected to the brightness acquisition component 100,
and may be configured to process the image captured by the
brightness acquisition component 100 to obtain the brightness of
the display panel 10.
[0043] The energy of the light exited from the display panel 10 may
be mainly concentrated on the principal light transmitted along a
direction perpendicular to the tangent of the light-emitting point,
and the energy of the light transmitted along other directions may
be smaller, and the energy that is farther away from the principal
light may be even smaller. FIG. 4 only illustrates a portion of the
principal light exited from the flat area 410 and the curved area
420.
[0044] The first curved area 421 may be an area with a large
curvature in the curved area 420. In one embodiment, as shown in
FIG. 4, the curved area 420 may include only the first curved area
421. In some embodiments, the curved area 420 may further include
other curved area outside the first curved area 421.
[0045] FIG. 5 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure. As shown
in FIG. 5, based on the structure of the display panel 400
illustrated in FIG. 4, the curved area 420 may further include a
second curved area 422, and the second curved area 422 may be
disposed between the first curved area 421 and the flat area 410.
The curvature of the second curved area 422 may be relatively
small, and the principle light E exited from the second curved area
422 may be incident on the viewfinder plane 500 of the brightness
acquisition component 100. For illustrative purposes, as shown in
FIG. 5, the principle light E may be incident on the first area 510
of the viewfinder plane 500.
[0046] In some embodiments, as shown in FIG. 6, the principle light
E may be incident on the second area 520 of the viewfinder plane
500, and may not overlap with the principle light F incident on the
first area 510. Accordingly, the pixels corresponding to the
principal light F and the principal light E may be accurately
distinguished in the correspondingly obtained brightness image.
Under the configurations illustrated in FIG. 5 and FIG. 6 described
above, the corresponding principle light E may not need to be
introduced into the viewfinder plane 500 of the brightness
acquisition component 100, the design difficulty of the optical
path adjustment component 200 may be simplified based on the
condition that the brightness information of the entire display
panel may be obtained by the brightness acquisition component
100.
[0047] According to different curvatures of the second curved area
422, the principle light E exited from the second curved area 422
may have different incident areas in the viewfinder plane 500. In
particular, as shown in FIG. 5, when the curvature of the second
curved area 422 is small, the principal light E may be incident on
the first area 510, and the principal light E and the principal
light D may not interfere with each other. Further, as shown in
FIG. 6, the curvature of the second curved area 422 may be slightly
increased, the principle light E may be incident on the second area
520, and the principle light E and the principle light F may not
interfere with each other. When the curvature of the second curved
area 422 continues to be increased, the incident area of the
principle light E on the viewfinder plane 500 may be as follows.
When the principle light E is transmitted along its natural
transmission direction to the portion overlapping with the
principle light F in the second area 520, and the principle light E
and the principle light F may interfere with each other. Thus, the
pixel brightness in the first curved area 421 and the second curved
area 422 may not be effectively obtained. At this time, as shown in
FIG. 7, the optical path adjustment component 200 may be configured
to adjust the optical path of the principle light F exited from the
first curved area 421 and the principle light E exited from the
second area surface 422 to prevent interfering with each other.
[0048] The optical path adjustment component 200 may be configured
to adjust the optical path of the principle light exited from at
least a portion of the curved area 420 such that the principle
light whose optical path is adjusted may be incident on the second
area 520. Accordingly, the brightness acquisition component 100 may
acquire the pixel brightness information in the corresponding
curved area 420. In one embodiment, the structure of the optical
path adjustment component 200 may be adjusted to achieve a
non-overlapping of the first area 510 and the second area 520, the
interference between the light exited from the flat area 410 and
the light exited from the curved area 420 may be avoided.
[0049] The specific structure of the optical path adjustment
component 200 is not limited by the present disclosure. Any
structure capable of realizing the optical path adjustment function
is within the protection scope of the present disclosure.
[0050] In the technical solution provided in the present
disclosure, the optical path adjustment component may be disposed
on the optical path of light exited from a first curved area of the
display panel, and the optical path adjustment component may be
used to adjust the principle light exited from the first curved
area to be incident on the second area of the viewfinder plane of
the brightness acquisition component. The second area may not
overlap the first area of the viewfinder plane of the brightness
acquisition component corresponding to the principle light exited
from the flat area of the display panel such that the principle
light exited from the flat area and the first curved area of the
display panel may be incident on different areas of the viewfinder
plane of the brightness acquisition component. Accordingly, the
brightness acquisition component may be able to obtain the
brightness information of all pixels in the display panel. Further,
the principle light exited from the flat area and the first curved
area may not interfere with each other. Thus, the accuracy of the
pixel brightness information obtained by the brightness acquisition
component may be improved; and the improvement of the compensation
effect may be facilitated.
[0051] FIG. 8 illustrates a portion of the structure in FIG. 4. As
shown in FIG. 8, the first curved area 421 may include a plurality
of pixels 600, and the second area 520 may include a plurality of
pixel areas 521. Each pixel area 521 may correspond to one pixel
600. All principal light F exited from each pixel 600 in the first
curved area 421 may be incident on a corresponding pixel area 521,
and any two adjacent pixel areas 521 may not overlap.
[0052] By properly setting the structure of the light path
adjusting component 200, the condition that any two adjacent pixel
areas 521 do not overlap may be achieved. Such a setting method may
enable the principle light exited from any pixel 600 in the first
curved area 521 to be incident on a specific area of the viewfinder
plane 500, and the principle light F exited by the adjacent pixels
600 may not interfere with each other. Accordingly, the accuracy of
the pixel brightness information obtained by the brightness
acquisition component 100 may be further improved.
[0053] Further, referring to FIG. 8, the optical path adjustment
component 200 may include a reflection mirror (not labeled), and
the reflection surface A of the reflection mirror may be disposed
opposing to the first curved area 421.
[0054] The reflection surface A of the reflection mirror may
reflect the principle light F exited from the first curved area 421
to adjust the optical path of the principle light F. By adjusting
the optical path of the principle light F, the principle light F
with the transmission direction having no intersection point with
the viewfinder plane 500 of the brightness acquisition component
100 may be adjusted to be incident on the second area 520 of the
viewfinder plane 500 such that the brightness acquisition component
100 may be able to obtain pixel brightness information of the
corresponding area of the display panel.
[0055] In one embodiment, as shown in FIG. 8, the reflection
surface A may be a curved surface, and the curved surface may be
convex toward a side facing away from the first curved area
421.
[0056] In some embodiments as shown in FIG. 9, the reflection
surface A of the reflection mirror may also be a flat surface.
However, comparing with a flat reflection surface, the curvature of
the curved reflection surface A may be adjustable. In one
embodiment, an operator may set the curvature of the reflection
surface A reasonably according to actual needs. By adjusting the
degree of the curvature of the reflection surface A, the distance
between the principle light F exited from the adjacent pixels 600
in the first curved area 421 on the viewfinder plane 500 may be
increased. Accordingly, the distance between adjacent pixel areas
521 in the viewfinder plane 500 may be increased. Thus, the
overlapping of the adjacent pixel areas 521 may be avoided; and the
probability that the principle light exited by the adjacent pixels
600 interfere with each other may be reduced.
[0057] For the case where the light path adjustment component 200
is a mirror, for the pixels 600 in the curved area 420 of the
display panel having the largest distance with the flat area 400,
the incident point of the principle light F exited from such pixels
on the viewfinder plane 500 may be closest to the first area 500
after the principle light is reflected by the reflection mirror.
Thus, in the brightness image captured by the brightness
acquisition component 100, the portion of the image corresponding
to the curved area 420 may be flipped. In particular, the pixels
600 in the curved area 420 of the display panel 400 closer to the
flat area 410 may be far from the flat area 410 in the brightness
image. Therefore, when adjusting the degree of curvature of the
optical path adjustment component 200, as long as the incident
points of the principal light F exited from the pixels 600 farthest
from the flat area 410 in the curved area 420 on the viewfinder
plane 500 have a certain distance with the first area 510 and the
incident points of the principle light F exited by the pixels 600
closest to the flat area 410 in the curved area 420 on the
viewfinder plane 500 have a certain distance with the edge
corresponding to the view finder surface 500, the degree of the
curvature of the optical path adjustment component 200 may be
finished.
[0058] FIG. 10 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure. As shown
in FIG. 10, the optical path adjusting component 200 may include at
least one refraction layer 210. The refractive index of the
refraction layer 210 may be greater than the refractive index of
air. When the number of the at least one refraction layer 210 is
greater than or equal to 2, the plurality of refraction layers 210
may be sequentially stacked along the light-emitting direction of
the display panel; and the refractive indexes may be sequentially
reduced.
[0059] In one embodiment, as shown in FIG. 10, the optical path
adjustment component 200 may include a first refraction layer 211
and a second refraction layer 212 in a solid state. The first
refraction layer 211 and the second refraction layer 212 may be
sequentially stacked along the light-emitting direction of the
display panel 400. The refractive index of the second refraction
layer 211 may be smaller than the refractive index of the first
refraction layer 211.
[0060] When light propagates between two media, the angle between
the light and the normal in the optically sparse medium is larger
than the angle between the light and the normal in the optically
dense medium, and the refractive index of the optically sparse
medium is smaller than the refractive index of the optically dense
medium. Thus, in one embodiment, the plurality of refraction layers
210 may be sequentially stacked along the light-emitting direction
of the display panel 400 and the refractive indexes may be
sequentially reduced such that the angle between the principle
light F exited from the curved area 420 and after being adjusted by
the optical path adjustment component 200 and the normal may be
increased, and may be deflected toward the side closer to the
brightness acquisition component 100, and may be incident on the
viewfinder plane of the brightness acquisition component 100.
[0061] The state of the refraction layer 210 may not be
specifically limited in the present disclosure. The refraction
layer 210 may be liquid, solid, or gas. When the refraction layer
210 is liquid, or gas, to allow the liquid or the gas to be
disposed at the corresponding position, the refraction layer may
further include a sealing member for sealing the liquid, or the
gas.
[0062] In one embodiment, referring to FIG. 10, the optical path
adjustment component 200 may cover the entire display panel 400.
Such a setting method may enable the optical path adjustment
component 200 to adjust the optical path of any principle light
exited from the display panel 400 to avoid a situation that a
portion of the principle light F exited from the first curved area
421 is not adjusted by the optical path adjustment component 200.
Thus, it may ensure that all the principle light F exited from the
first curved area 421 may be adjusted by the optical path
adjustment component 200 and then may be incident on the viewfinder
plane 500 of the brightness acquisition component 100.
[0063] Further, as shown in FIG. 10, the optical path adjustment
component 200 may be attached and fitted to the display panel 400.
For such a configuration, on the one hand, the preparation of the
refraction layer 210 may be facilitated. On the other hand, a gap
may be prevented from forming between the optical path adjustment
component 200 and the display panel 400. When the gap is formed
between the optical path adjustment component 200 and the display
panel 400, the air in the gap may change the optical path of the
principle light F exited from the display panel 400, and the
difficulty for the optical path adjustment may be increased.
[0064] FIG. 11 illustrates another exemplary device for obtaining
brightness of a display panel working normally consistent with
various disclosed embodiments of the present disclosure. The
structure illustrated in FIG. 11 is similar to the structure
illustrated in FIG. 10. The major difference may be that at least
one refraction layer 210 in FIG. 11 may include a gas layer 213 and
a solid sealing layer 214 sequentially stacked along the
light-emitting direction of the display panel 400.
[0065] The structure of the optical path adjustment component 200
illustrated in FIG. 11 may be simple, and may be easy to fabricate,
and may be a desirable optical path adjustment component. When
there is a bonding error, a gap may be formed between the optical
path adjustment component 200 and the display panel 400. The
increase of the difficulty of adjusting the optical path may be
avoided by changing the environment in the gap. In particular, FIG.
12 illustrates another device for obtaining brightness of a display
panel works normally consistent with various disclosed embodiments
of the present disclosure. As shown in FIG. 12, a sealed space B
may be formed between the optical path adjustment component 200 and
the display panel 400. The pressure in the sealed space B may be
less than the standard atmospheric pressure. In particular, the
sealed space B may be under a vacuum environment. The vacuum
environment may not change the transmission path of light.
Therefore, after vacuuming the sealed space B, the optical path of
the principle light F exited from the display panel 400 in the
sealed space B may not change, and the principle light F may be
transmitted along a straight line. Thus, the difficulty of the
optical path adjustment may be increased.
[0066] In some embodiments, the optical path adjustment member 200
may cover only the curved area 420. FIG. 13 illustrates another
exemplary brightness obtaining device of a display panel working
normally consistent with various disclosed embodiments of the
present disclosure. The structure shown in FIG. 13 is similar to
the structure shown in FIG. 10. The major difference may be that
the optical path adjustment component 200 in FIG. 13 may only cover
the curved area 420 to ensure that the principle light F exited
from the first curved area 421 may be incident on the viewfinder
plane 500 of the brightness acquisition component 100 while the
volume of the optical path adjustment component 200 may be
reduced.
[0067] The number of the refraction layers 210 in the optical path
adjustment component 200 may not be specifically limited in the
present disclosure. For example, as shown in FIG. 10 and FIG. 13,
the optical path adjustment component 200 may include two
refraction layers 210, and as shown in FIG. 11, the optical path
adjustment component 200 may also include one refraction layer 210.
Further, when the optical path adjustment component 200 includes
one refraction layer 210, the refraction layer 210 may be a single
solid material layer, as shown in FIGS. 14 and 15. The single solid
material layer may be easy to prepare, the refractive index of the
single solid material layer may be easy to control, and the
structure may be simple. Thus, it may facilitate to reduce the
difficulty of manufacturing the optical path adjustment component
200, and to improve the optical path adjustment performance.
[0068] FIG. 16 illustrates a portion of the structure in FIG. 15.
As shown in FIG. 16, for the case where the optical path adjustment
component 200 includes at least one refraction layer 210, for the
pixels 600 in the curved area 420 of the display panel 400 farther
from the flat area 410, after the principle light F exited by such
pixels being refracted on the viewfinder plane 500 of the
brightness acquisition component 100, the incident points of the
refracted principle light F on the viewfinder plane may be farther
from the first region. Thus, in the brightness image captured by
the brightness acquisition component 100, the positional
relationship between the curved image portion and the flat image
portion may be same as the positional relationship between the
curved area 420 and the flat area 410 of the display panel 400. The
curved image portion may be a portion of the brightness image
corresponding to the curved area 420, and the flat image portion
may be a portion of the brightness image corresponding to the flat
area 410. Therefore, when adjusting the curvature of the optical
path adjustment component 200, as long as the incident point of the
principal light F exited from the pixel 600 closest to the flat
area 410 in the curved area 420 on the viewfinder plane 500 has a
certain distance with the first area, and the incident point of the
principle light F exited by the pixel 600 farthest from the flat
area 410 in the curved area 420 on the viewfinder plane 500 has a
certain distance with the edge corresponding to the viewfinder
plane 500, the adjustment may be finished.
[0069] The present disclosure also provides a method for obtaining
brightness of a display panel. FIG. 17 illustrates a flowchart of
an exemplary method of for obtaining brightness of a display panel
consistent with various disclosed embodiments of the present
disclosure. The method for obtaining brightness of the display
panel may be implemented using the device for obtaining the
brightness of the display panel provided by the present disclosure,
or other appropriate device.
[0070] As shown in FIG. 17, the method for obtaining brightness of
the display panel may include Step 11: lighting up the display
panel.
[0071] In one embodiment, the display panel may be a flexible
display panel. For example, the display panel may include a flat
area and a curved area, and the curved area may be located on two
opposite sides of the flat area. In particular, the display panel
may include a plurality of pixels, and each pixel may be lit to
light up the display panel such that each pixel may emit light.
Optionally, the display panel may be an organic light-emitting
display panel, and correspondingly, the pixels may be organic
light-emitting devices. Each organic light-emitting device may
include a first electrode, an organic light-emitting functional
layer, and a second electrode that are sequentially stacked along a
light-emitting direction of the light-emitting device. Each organic
light-emitting device may be electrically connected to a pixel
driving circuit, and the pixel driving circuit may be configured to
drive the corresponding organic light-emitting device to emit
light.
[0072] The method for obtaining brightness of the display panel may
also include Step 12: using a brightness acquisition component to
take an image of the displayed imaged of the display panel.
[0073] The "image" is a brightness image of the display panel, and
it may contain pixel brightness information of the display panel.
The optical path adjustment component in the brightness acquisition
component of the display panel may enable the principle light
exited from each area of the display panel to be incident on the
viewfinder plane of the brightness acquisition component such that
the brightness acquisition component may be able to form the image
containing the brightness information of the pixels in the entire
display panel.
[0074] Further, the method for obtaining brightness of the display
panel may include Step 13: using a control component to process the
image to obtain the brightness of the display panel.
[0075] The "brightness of the display panel" is the brightness of
each pixel after a brightness compensation process. In particular,
the control component may extract the brightness of each pixel from
the image captured by the brightness acquisition component, and may
obtain the brightness of the display panel based on the brightness
of the pixel and a preset method.
[0076] In the technical solution provided in the present
disclosure, by lighting up the display panel, the brightness
acquisition component may be configured to capture an image of the
displayed image, and the control component may be used to process
the image to obtain the brightness of the display panel.
Accordingly, the pixel brightness compensation of the display panel
may be realized, and the display effect of the display panel may be
effectively improved.
[0077] In one embodiment, the step for using the control component
to process the image to obtain the brightness of the display panel
may include obtaining a brightness compensation coefficient of each
pixel in the curved area; extracting the first original brightness
of each pixel in the curved area in the image; obtaining the target
brightness of each pixel in the curved area according to the
brightness compensation coefficient and the first original
brightness; extracting the second original brightness of each pixel
in the flat area in the image; and configuring the second original
brightness of each pixel in the flat area and the target brightness
of each pixel in the curved area as the brightness of the display
panel.
[0078] FIG. 18 illustrates an exemplary brightness image of a
display panel consistent with various disclosed embodiments of the
present disclosure. As shown in FIG. 18, the brightness image 20
captured by the brightness acquisition component may include a flat
region 21 and a curved region 22, and each of the flat region 21
and the curved region 22 may include a plurality of pixels 30.
Based on this structure, the step for obtaining the brightness of
the display panel may include obtaining the brightness compensation
coefficient of each of the twenty four pixels 30 in the curved
region 22, and the specific obtaining method will be described
later in detail. Then, the brightness of each of the twenty four
pixels 30 in the curved surface area 22 in the brightness image 20
may be extracted as the first original brightness of the
corresponding pixel 30. So far, the brightness compensation
coefficient and the first original brightness of each pixel 30 in
the curved surface area 22 may be known parameters. Based on the
two known parameters and a preset calculation method, the
brightness of the corresponding pixel 30 after the compensation may
be obtained. In particular, the target brightness of each pixel 30
may be obtained.
[0079] The brightness of the display panel may be the brightness
information of all pixels in the display panel, including the pixel
brightness information in the flat area and the pixel brightness
information in the curved area. In particular, the brightness of
the display panel may the pixel brightness information in the flat
area 21 and the pixel brightness information in the curved area 22
in FIG. 18. The pixel brightness information in the curved area 22
may be the target brightness of the obtained pixels 30. The
principle light exited by the pixels 30 in the flat area 22 may be
directly incident on the viewfinder plane of the brightness
acquisition component, and no brightness compensation may be
required. Therefore, the brightness of each pixel 30 in the flat
area 21 in the brightness image 20 may be extracted as the second
original brightness of the corresponding pixels 30 and the pixel
brightness information in the flat area 21.
[0080] Further, the step for obtaining the brightness compensation
coefficient of each pixel in the curved area may include extracting
the second original brightness of the n-columns of pixels in the
flat area near one side of the curved area; calculating the first
average value of the second original brightness of the n-columns of
pixels; extracting the first original brightness of each pixel in
the curved area, and calculating the second average value of the
first original brightness of each adjacent m-columns of pixels;
taking the ratio of each second average value to the first average
value as the brightness compensation coefficient of each pixel
corresponding to the second average value. n and m may be both
positive integers; and 1.ltoreq.n.ltoreq.P is the total number of
columns of pixels in the flat area. 1.ltoreq.m.ltoreq.Q, and Q is
an integer time of m, and Q is the total number of columns of the
pixels in the curved area.
[0081] Taking the brightness image 20 shown in FIG. 18 as an
example, and setting n=1, in particular, the brightness of six
pixels 30 in the first pixel column 701 in the flat area 21 near
the curved area 22 and on the left side of the curved area 22 may
be extracted as the second original brightness V1, V2, V3, V4, V5,
and V6 of the six pixels 30. The first average value of the first
original brightness of the six pixels 30 in the first pixel column
701 may be calculated as P=(V1+V2+V3+V4+V5+V6)/6. The brightness of
each of the twelve pixels 30 in the curved area 22 may be extracted
as the first original brightness U1, U2, U3, U4, U5, U6, U7, U8,
U9, U10, U11, and U12 of the corresponding pixels 30. U1 U2, U3,
U4, U5, and U6 may be the first original brightness of the six
pixels 30 in the second pixel column 702, and U7, U8, U9, U10, U11,
and U12 may be the first original brightness of the six pixels 30
in the third pixel column 703, respectively. By setting m=1, the
second average value of the first original brightness of the six
pixels 30 in the second pixel column 702 may be calculated as
Q1=(U1+U2+U3+U4+U5+U6)/6, and the second average value of the first
original brightness of the six pixels 30 in the third pixel column
703 may be calculated as Q2=(U7+U8+U9+U10+U11+U12)/6. The ratio
T1=Q1/P may be used as the brightness compensation coefficient of
each pixel 30 in the second pixel column 702, and the ratio T2=Q2/P
may be used as the brightness compensation coefficient of each
pixel 30 in the third pixel column 703.
[0082] The curved surface area 22 may be two or more. For
illustrative purposes, FIG. 18 only include two curved surface
areas 22 located on opposing sides of the flat area 21
respectively. The brightness compensation coefficients of the
pixels 30 in each curved area 22 may be obtained according to the
pixel brightness information of the n-pixel columns in the flat
region 21 near the curved surface region 22 and the pixel
brightness information in the pixels in the n-pixel columns. For
example, as described above, the brightness compensation
coefficients of the pixels 30 in the left curved area 22 in FIG. 18
may be obtained according to the pixel brightness information of
the first pixel column 701 in the planar area 21 near the curved
area 22 and the pixel brightness information of each the pixel 30
in the left curved area 22.
[0083] In one embodiment, the step for obtaining the target
brightness of each pixel in the curved area according to the
brightness compensation coefficient and the first original
brightness may include: multiplying the first original brightness
of each pixel in the curved area and the brightness compensation
coefficient and configuring the product as the target brightness of
the pixel.
[0084] Further, for illustrative purposes, as shown in FIG. 18, U1,
U2, U3, U4, U5, and U6 may be the first original brightness of the
six pixels 30 in the second pixel column 702, respectively, and
T1=Q1/P may be the brightness compensation coefficient of each
pixel 30 in the second pixel column 702; and U1.times.T1,
U2.times.T1, U3.times.T1, U4.times.T1, U5.times.T1, and U6.times.T1
may be configured as the target brightness of each pixel 30 in the
second pixel column 702. U6, U7, U8, U9, U10, U11, and U12 may be
the first original brightness of the six pixels 30 in the third
pixel column 703, respectively; and T2=Q2/P may be the brightness
compensation coefficient of each pixel 30 in the third pixel column
703; and U7.times.T2, U8.times.T2, U9.times.T2, U10.times.T2,
U11.times.T2, and U12.times.T2 may be configured as the target
brightness of each pixel 30 in the third pixel column 703.
[0085] For illustrative purposes, FIG. 18 only uses n=1 and m=1 as
an example for description. However, the values of m and n are not
limited by the present disclosure. In some embodiments, n and m may
also be values other than 1, for example, the range of n may be
5.ltoreq.n.ltoreq.15, and m=1.
[0086] The edge of the flat area is the transition area between the
flat area and the curved area. The pixel brightness information in
such a transition area may be affected by the curved area; and
there may be certain differences for the pixel brightness
information of other areas in the flat area. The compensation
effect corresponding to the obtained brightness compensation
coefficient of the pixel may be not as desired. Thus, the value of
n may not be too small. Further, if the value of n is too large,
the amount of calculation may be increased. Accordingly, the
calculation difficulty of the pixel brightness compensation
coefficients may be increased. When 5.ltoreq.n.ltoreq.15, the
brightness compensation effect of the pixel may be as desired, and
the calculation difficulty may be moderate.
[0087] Further, according to the above-mentioned calculation method
of the brightness compensation coefficients of the pixels, the
smaller m is, the more accurate the brightness compensation
coefficient of the pixel is, the higher the correlation with the
corresponding pixel is, and the better the compensation effect is.
Thus, m=1 may be a desirable value.
[0088] According to the technical solutions provided by the present
disclosure, an optical path adjustment component may be disposed on
an optical path of light exited from a first curved area of a
display panel, and the optical path adjustment component may be
configured to adjust principle light exited from the first curved
area to be incident on a second area of the viewfinder plane of the
brightness acquisition component. The second area may not overlap
the first area of the viewfinder plane of the brightness
acquisition component corresponding to the principle light exited
from the flat area of the display panel such that the principle
light exited from the flat area and the first curved area in the
display panel may be incident on different areas of the viewfinder
plane of the brightness acquisition component. The brightness
acquisition component may obtain the brightness information of all
pixels in the display panel, and the principle light exited from
the flat area and the first curved area may not interfere with each
other. Accordingly, the accuracy of the pixel brightness
information obtained by the brightness acquisition component may be
improved, and the compensation effect may be effectively
enhanced.
[0089] The description of the disclosed embodiments is provided to
illustrate the present disclosure to those skilled in the art.
Various modifications to these embodiments will be readily apparent
to those skilled in the art, and the generic principles defined
herein may be applied to other embodiments without departing from
the spirit or scope of the disclosure. Thus, the present disclosure
is not intended to be limited to the embodiments shown herein but
is to be accorded the widest scope consistent with the principles
and novel features disclosed herein.
* * * * *